iBatis学习小结

sqlMap文件

代码

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE sqlMap
    PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN"
    "http://ibatis.apache.org/dtd/sql-map-2.dtd">
<sqlMap namespace="Account">
  <typeAlias alias="Account" type="test.Account"/>
  <!--列表查询,返回Account Object的List-->
  <resultMap id="AccountResult" class="Account">
    <result property="id" column="ID"/>
    <result property="firstName" column="FIRST_NAME"/>
    <result property="lastName" column="LAST_NAME"/>
    <result property="emailAddress" column="EMAIL"/>
  </resultMap>
  <select id="selectAllAccounts" resultMap="AccountResult">
    select * from ACCOUNT
  </select>

  <!--列表查询,返回HashMap的List -->
  <!--resultMap无需再通过JDBC ResultSetMetaData 来动态获取字段信息，性能有提高-->

  <resultMap id="mapResult" class="java.util.HashMap">
    <result property="roleid" column="ROLEID"/>
    <result property="rolename" column="ROLENAME"/>
    <result property="id" column="ID"/>
    <result property="firstName" column="FIRST_NAME"/>
    <result property="lastName" column="LAST_NAME"/>
    <result property="emailAddress" column="EMAIL"/>
    <result property="dt" column="DT"/>
  </resultMap>
  <select id="selectAllAccountsWithMap" resultMap="mapResult">
        select B.ROLEID, B.ROLENAME, A.ID, A.FIRST_NAME,A.LAST_NAME,A.EMAIL,A.DT
        from ACCOUNT A left outer join ROLE B   on A.ROLEID = B.ROLEID
        ORDER BY A.ID DESC
  </select>

<!--动态构造查询条件-->
<select id="getUsers" parameterClass="user" resultMap="get-user-result">
    Select id,name,sex from t_user
    <dynamic prepend="WHERE">
        <isNotEmpty prepend="AND" property="name">
            (name like #name#)
        </isNotEmpty>
        <isNotEmpty prepend="AND" property="address">
            (address like #address#)
        </isNotEmpty>
    </dynamic>
</select>
<isNotEmpty prepend="AND" property="name">
    ( name=#name#
        <isNotEmpty prepend="AND" property="address">
            address=#address#
        </isNotEmpty>
    )
</isNotEmpty>
<select id="dynamicGetAccountList" resultMap="account-result" >
    select * from ACCOUNT
    <dynamic prepend="WHERE">
        <isNotNull prepend="AND" property="firstName" open=”(“ close=”)”>
            ACC_FIRST_NAME = #firstName#
            <isNotNull prepend="OR" property="lastName">
                ACC_LAST_NAME = #lastName#
            </isNotNull>
        </isNotNull>
        <isNotNull prepend="AND" property="emailAddress">
            ACC_EMAIL like #emailAddress#
        </isNotNull>
        <isGreaterThan prepend="AND" property="id" compareValue="0">
            ACC_ID = #id#
        </isGreaterThan>
    </dynamic>
    order by ACC_LAST_NAME
</select>

<isParameterPresent> <isNotParameterPresent> <isNull> <isNotNull> <isEmpty> <isNotEmpty>
<isEqual> <isNotEqual> <isGreaterThan> <isGreaterEqual> <isLessThan> <isLessEqual>

<!-- Sql片段的是用-->
<sql id="selectItem_fragment">
    FROM items WHERE parentid = 6
</sql>
<select id="selectItemCount" resultClass="int">
    SELECT COUNT(*) AS total
    <include refid="selectItem_fragment"/>
</select>
<select id="selectItems" resultClass="Item">
    SELECT id, name
    <include refid="selectItem_fragment"/>
</select>

<!--缓存-->
<cacheModel id="product-cache" type="LRU">
    <flushInterval hours="24"/>
    <flushOnExecute statement="insertProduct"/>
    <flushOnExecute statement="updateProduct"/>
    <flushOnExecute statement="deleteProduct"/>
    <property name=”size” value=”1000” />
</cacheModel>
<select id=”getProductList” parameterClass=”int” cacheModel=”product-cache”>
    select * from PRODUCT where PRD_CAT_ID = #value#
</select>

<!—对XML支持 -->
<select id="getPerson" parameterClass=”int” resultClass="xml" xmlResultName=”person”>
    SELECT
    PER_ID as id,
    PER_FIRST_NAME as firstName,
    PER_LAST_NAME as lastName,
    PER_BIRTH_DATE as birthDate,
    PER_WEIGHT_KG as weightInKilograms,
    PER_HEIGHT_M as heightInMeters
    FROM PERSON
    WHERE PER_ID = #value#
</select>
<person>
    <id>1</id>
    <firstName>Clinton</firstName>
    <lastName>Begin</lastName>
    <birthDate>1900-01-01</birthDate>
    <weightInKilograms>89</weightInKilograms>
    <heightInMeters>1.77</heightInMeters>
</person>

<!—字符串替换
select * from $tableName$
Important Note 1: This support will only substitute Strings, so it is not appropriate for complex data types like Date or Timestamp.
Important Note 2: If you use this support to alter a table name, or a column list, in an SQL select statement,then you should always specify remapResults=“true”
-->.

<!—关联查询方式，有1/N问题-->
<sqlMap namespace="User">
    <typeAlias alias="user" type="com.ibatis.sample.User"/>
    <typeAlias alias="address" type="com.ibatis.sample.Address"/>
    <resultMap id="get-user-result" class="user">
        <result property="id" column="id"/>
        <result property="name" column="name"/>
        <result property="sex" column="sex"/>
        <result property="addresses" column="id"    select="User.getAddressByUserId"/>
    </resultMap>
    <select id="getUsers"   parameterClass="java.lang.String" resultMap="get-user-result">
        <![CDATA[Select id,name,sex from t_user where id = #id#]]>
    </select>
    <select id="getAddressByUserId" parameterClass="int" resultClass="address">
        <![CDATA[select address,zipcode from t_address where user_id = #userid# ]]>
    </select>
</sqlMap>
<resultMap id="get-user-result" class="user">
    <result property="id" column="id"/>
    <result property="name" column="name"/>
    <result property="sex" column="sex"/>
    <result property="address" column="t_address.address"/>
    <result property="zipCode" column="t_address.zipcode"/>
</resultMap>
<select id="getUsers" parameterClass="java.lang.String" resultMap="get-user-result">
    <![CDATA[select* from t_user,t_address where t_user.id=t_address.user_id]]>
</select>
保证User 类中包含address和zipCode两个String型属性。

<!—关联查询，无1/N问题-->
  <resultMap id="AccountResultWithRole" class="Account" groupBy="id">
    <result property="id" column="ID"/>
    <result property="firstName" column="FIRST_NAME"/>
    <result property="lastName" column="LAST_NAME"/>
    <result property="emailAddress" column="EMAIL"/>
    <result property="role" resultMap="Account.roleResult"/>
  </resultMap>
  <resultMap id="roleResult" class="test.Role">
    <result property="roleid" column="ROLEID"/>
    <result property="rolename" column="ROLENAME"/>
  </resultMap>
  <select id="selectAccountByIdWithRole" parameterClass="int" resultMap="AccountResultWithRole">
        select B.ROLEID, B.ROLENAME, A.ID, A.FIRST_NAME,A.LAST_NAME,A.EMAIL from ACCOUNT A left outer join ROLE B on A.ROLEID = B.ROLEID where A.ID = #id#
  </select>

  <!--查询-->
  <select id="selectAccountById" parameterClass="int" resultClass="Account">
    select ID as id,FIRST_NAME as firstName,LAST_NAME as lastName,       EMAIL as emailAddress from ACCOUNT where ID = #id#
  </select>

  <!--新增-->
  <insert id="insertAccount" parameterClass="Account">
    insert into ACCOUNT (FIRST_NAME,LAST_NAME,EMAIL,PID,DT)
    values (#firstName:VARCHAR#, #lastName:VARCHAR#, #emailAddress:VARCHAR#,#pid:INTEGER:0#,#dt:TIME#)
    <selectKey resultClass="int" type="post" keyProperty="id">
        SELECT @@IDENTITY AS ID
    </selectKey>
  </insert>

  <!--更新-->
  <update id="updateAccount" parameterClass="Account">
    update ACCOUNT set
      FIRST_NAME = #firstName:VARCHAR#,
      LAST_NAME = #lastName:VARCHAR#,
      EMAIL = #emailAddress:VARCHAR#
    where
      ID = #id#
  </update>

  <!--删除-->
  <delete id="deleteAccountById" parameterClass="int">
    delete from ACCOUNT where ID = #id#
  </delete>

  <!--存储过程，如果没有返回列表，procTest的resultMap可以省略-->
  <parameterMap id="procParamMap" class="java.util.HashMap" >
    <parameter property="id" jdbcType="INTEGER" javaType="java.lang.Integer" mode="IN"/>
    <parameter property="outid" jdbcType="INTEGER" javaType="java.lang.Integer" mode="OUT"/>
    <parameter property="errMsg" jdbcType="VARCHAR" javaType="java.lang.String" mode="OUT"/>
  </parameterMap>
  <resultMap id="procResultMap" class="java.util.HashMap" >
    <result property="a" column="AAA"/>
    <result property="b" column="BBB"/>
    <result property="c" column="CCC"/>
  </resultMap>
  <procedure id="procTest" parameterMap="procParamMap" resultMap="procResultMap">
    {call test_sp_1 (?,?,?)}
  </procedure>
</sqlMap>

 

 

java 代码

代码

public class TestDao extends SqlMapClientDaoSupport {
    public List selectAllAccounts() throws SQLException {
        return getSqlMapClientTemplate().queryForList("selectAllAccounts");
    }

    public List selectAllAccountsWithMap() throws SQLException {
        return getSqlMapClientTemplate().queryForList(
                "selectAllAccountsWithMap");
    }

    public Account selectAccountById(int id) throws SQLException {
        return (Account) getSqlMapClientTemplate().queryForObject(
                "selectAccountById", new Integer(id));
    }
    public List procTest(Map params) throws Exception {
        List ret = (List) getSqlMapClientTemplate().queryForList("procTest",params);
        return ret;
    }
    public Account selectAccountByIdWithRole(int id) throws SQLException {
        return (Account) getSqlMapClientTemplate().queryForObject(
                "selectAccountByIdWithRole", new Integer(id));
    }